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发明名称
Improvements in or relating to thermionic valves
摘要
申请公布号
GB496839(A)
申请公布日期
1938.12.07
申请号
GB19370031876
申请日期
1937.11.19
申请人
THE M-O VALVE COMPANY LIMITED;GEOFFREY WILLIAM WARREN
发明人
分类号
H01J21/14
主分类号
H01J21/14
代理机构
代理人
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地址
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